No, I'm not talking about plate tectonics, I'm talking about crustal displacement. The entire crust moves at once. The ancient Egyptians claim that they're the oldest civilization because they've observed three of these movements. At the same time of Joshua where the bible says the sun didn't set for a whole day, the ancient inhabitants of Mexico (being on the other side of the planet) said the sun didn't rise for a whole day and through the night they guessed where it would rise (apparently this had happened in their history before), the ones that guessed what is presently the east were correct.
Your comment reminds me of Genesis 10:25. Here discussing the sons of Shem; And unto Eber were born two sons:the name of one was Peleg; for in his days was the earth divided... To me this sounded like it had to be a major event. Whatever Peleg means in the tongue of the day it had to do with this event. When science talks of continental drift I always thought of this verse and that perhaps it was no gradual occurance. Never heard anyone expound upon this verse though.